Coupling



July 21, 1936.

D. B. GISH COUPLING Filed Feb. 21, 1956 I INVENT OR. zzwzvzfl 626%.

I ATTORNEY,

Patented July 21, 1936 UNITED STATES PATENT OFFICE- 2,048,117 oourmvc 7 Daniel B. can, West Springfield, Mass. Application February 21, 1938, Serial No. 65,056

r 2 Claims. (01. 285-84) This invention relates to improvements in hose coupling structures.

The principal objects of the invention'aredirested to the provision of a 'novel method of and a means for coupling. flexible hose. One special feature of the invention is that an end of a hose is capped in such a way that the capped end may be received inv a coupling member and when the said member is placed on another member, the capped end of the-hose is locked between said members and prevented from displacement while leakage under high pressure is obviated.

, Anotherspecial feature of the invention is the provision of means to facilitate the connecting of a hose to apart which is of such a'character as to withstand the ever increasing requirements of high pressures.

Various and numerous novel objects advantages of the invention will be hereinafter more J fully referred to in connection with the accom panying description of the present preferred form of the'inventiomreference being had to the accompanying drawing wherein:

Fig. 1 is a partial elevational and sectional view to explain the features of the invention; I Fig; 2 is a view similar to Fig. 1' showing the parts of Fig. 1 in assembled relation; and

Fig. 3 is a partial sectional view similar to Fig. 2 to explain a modified form of the invention.

Referring now to the drawing more in detail, the-novel features .of the invention will be fully described.

In the drawing, a.hose is. represented atH- which is of the flexible type. Its wall may include a body part indicated by B which may be made up of layers of fabricated material and an outer covering -o r sheath 0. The covering is usually of a rubber composition or the like adapted to function as a protection of the fabricated material and yet permit the desired flexing of the hose.

A tail-piece 'is provided which has astem 2 and i.

a flange or head. The tail-piece is hollow as r at 5 and the stem! is adapted for insertionrin the bore h of the hose H with the head part I abutting the end of thehose II. A cap member 6 in the form of a sleeve is provided with a central bore to receive the hose H. The bore of the member 6 is roughened or has a plurality of barbs 50 or projections for impinging the hose. These --the tail-piece.

such as 3 or the like to provide alternate grooves,

. ridges, or barbs.

.III is chamfered or given a radius as shown for purposes to be later described and at the lower outsideend of the member 8 or at some convenient place there is a non-round wit to facilitate the member 8: being turned. In the form of the invention this is shown in Fig. 3 as being a hex 1. 'I'he.coup1ing member 8 shown has a threaded portion I! so that it maybe connected to or engaged with another part but in lieu of the specific 2b construction shown the member 8 may have a female threaded part instead of the male-thread shown. a

In assembling the parts the cap member or sleeve 6 is broughtinto abutment with the head 25,

4 of the tail-piece and when in this position the part 6 is contracted or reduced in diameter so as to squeeze the hose between its internal bore 71. and the stem "'2. This may be accomplished in one way by forcing the member 6 downwardly through the bore it of a die 20, said die being represented by dot-dash lines.

As the part '6 is movedv downwardly through the die it is compressed or reduced in diameter so that-the wall of the hose'is squeezed or com- 65 pressed between the wall of part 6 and the stem part 2 of the tail-piece. The projections or barbs on the interior bore of the cap Eimpihge and grip the wall or the hose while the barbs of the stem 2 impinge the wall of the bore of the hose. 40

I The cap member 6 is reduced to such a diameter that it is a tight fit in the socket I! of the coupling member I." In the form of the invention shown the lower end of thecap member 0. abuts the shoulder I 3 at the lower end of the socket 12m 1 Then when the coupling member 8 is connected to another part indicated by dot-dash .lines 20 the end face of the head 4 of the -piece'is brought up against the end part Ito the socket in the member. .In thisiwaythe end of the hose H- iscappedbythememberi soastobelockedbethe hose H is prevented from being forced outwardly through the bore) of member 81. That is by locking the cap member 6 and head 4 between the coupling members 8 and 20 and since the tail-piece and cap at the end of hoseare locked together, the. end of the hose is securely looked as desired. q

In lieu of the socket If in member 8 whichpro- .vides the shoulder I3 the said socket may be tapering and the die through which the cap 6 is pressed may have a tapering hole whereby when the cap ispQmpressed onto the hose its exterior has a taper to conform with the taper of the socket. Then the parts may be locked in themanner described so that capped endoi the hose may not be forced through the outer or lower end of the coupling member 8.

The chamfer I5 of the bore III of coupling 8 is important in that it allows the hose H to be bent sharply adjacent the end of the coupling member 8. There are no sharp cornersor confining edges which'may injure the covering of the hose and therefore a hose may be used which has a-relatively thin covering.

Heretofore hose of this type has had a relatively thick cover because the end of the coupling which was compressed over the hose formed an abrupt and cutting. edge, making the heavy or thick covering necessary. In this case the part actually gripping the hose is within the coupling member obviating confining parts where the hose .enters the coupling making it possible to provide a substantial radius at the end of the coupling where the hose enters whereby the hose may withstand the flexing or bending without injury thereto.

By reason of the novel construction referred to it is possible as stated to use a hose having a relatively thin outer covering which contributes not only to produce the desired flexibility of the hose but also makes it possible to employ a hose of less cost.

In the modification. of the invention shown in- Fig. 3, the cap member indicated by 6 has a diameter which is slightly less than the diameter of the socket in the member 8 whereby the member 8 may turn relative to the cap member as when connecting member 8 to a member such as 20. To facilitate the easy turning there may be of, it is not desired to be limited thereto since bottom part of the socket of member 8.

A washer or washers facilitates the rotation of coupling part 8 into another part so as to bring the end face of. the head of the tail-piece against 5 its seat which is necessary in order to connect the hose.

While I have described the invention in great detail and with respect to apreferred form there- 10 many changes and modifications may be made therein without departing from the spirit and scope of the invention. What it is desired to claim and secure by Letters Patent of the United States isz.

l. The combination of a length of hose with a. coupling means comprising, a tail-piece member having a body part extending into the bore of one I .about to grip said hose with its, upper end abutting the under side of said head, and a coupling member provided with'upper and lower bores of be substantially uniform and different diameters between which is a shoulder, the upper bore receiving said shell member with its lower end on said shoulder and the lower bore receiving the part ofthe hose which is immediately adjacent the lower 39 side of said shell member.

2. The combination of a. length or hose with a coupling means comprising, ahollow tail-piece member having a body part extending into the bore 01' one end portion of the hose and an en-. #0 larged disc-like head part outside the. end of the hose, a tubular shell member extending around said end portion of the hose and compressed substantially throughout its length thereabout to grip said hose and form a unit with its upper end in abutment with the underside of said head part, and a unitary coupling member provided with upper and lower bores of substantially uniform and difi'erent diameters, the upper bore receiving said shell member and the lower bore receiving that part of the hose which is immediately adjacent the lower side of the shell member, the unitary coupling member being rotatable relative to said unit. DANIEL B. GISH. 50 

